# Reaction–Diffusion (反応拡散パターン) — image generation prompt
# IndexStyle No.590 — https://indexstyle.org/styles/reaction-diffusion
# Style descriptors only. This prompt names no artist, studio, brand or work.

Produce four original images in the visual language of Reaction–Diffusion, a technique from Computational Expression, 1952–.

## What to make

Make the kind of thing this style exists for: explaining biological spot and stripe formation in research, education and exhibitions, or growing organic surface, motion and type patterns. Choose one subject and hold it across all four images.

## What has to be visible

- Round spots dividing at even distances
- Continuous curving maze stripes
- Coral or cellular boundaries branching from edges
- Self-organized marks of nearly constant thickness

Someone who knows this style should be able to point at each of these in the finished image.

## How to build it

- Layout and structure: Show growth from a seed or boundary condition rather than freezing a uniform all-over print
- Type and lettering: Place copy in low-density regions instead of eroding every letter with the pattern
- Material and surface: Set reaction terms, diffusion rates, feed and kill rates, then iterate from a small perturbation
- Colour: #F4E56B carries the ground, #38C6A3 is the colour the style is remembered by, #101B2E holds text and outlines. Read off real works, so treat them as a direction rather than a fixed palette.
- What it should feel like: futurity, technique, exhilaration

## What goes wrong

A hand-drawn animal print is not reaction-diffusion. Time and parameter changes must remain visible in the pattern.

## Across the four

Keep every cue above present in all four. Vary the framing, the scale and the arrangement so the set shows the range this style covers rather than four versions of one picture.

## Constraints

- Do not imitate, reference or name any specific artist, studio, brand, character or copyrighted work.
- Do not reproduce the composition of an existing work.
- Produce original compositions in the general period language described above.

Full design spec: https://indexstyle.org/styles/reaction-diffusion/design.md